 Edward Tufte
The work of Tufte and Graphics Press. Read testimonials about his books and purchase them online: The Graphic Display of Quantitative Information, Envisioning Information, and Visual Explanations: Images and Quantities, Evidence and Narrative. In the
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 EdWeb: Exploring Technology and School Reform  Andy Carvin
A hyperbook designed to explore the worlds of educational reform and information technology. Hunt down online educational resources around the world, learn about trends in education policy and information infrastructure development, examine success stories
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 Effective Use of Living Space (SMILE)  William L. Brown, Parkside Community Academy
A lesson designed to teach students to measure the area of a room and various objects in this room; place scale model furniture in a room and determine the area occupied; and calculate the percentage of space used. From the Practical and Applied Math
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 Effortless Algebra  maranGraphics Inc.
Flip and skip through the 305 pages of Effortless Algebra online. Laid out with a "visual grammar," this book covers fractions, exponents, matrices, polynomials, and radicals; solving basic equations, quadratic equations and inequalities; graphing linear
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 Efofex Software
Produce publication quality graphics for mathematics and science. Tools for math teachers include FX Draw, for drawing; FX Equation, for equations; and FX MathSpell, a mathematics dictionary addin for Microsoft Word. Tools for math students include FX
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 Eggbrain Productions  John P. Perna
A Flash website where young people can test themselves on a variety of subjects,
especially mathematics. Interactive quizzes on basic operations, basic algebra, fractions, simple geometry, etc.
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 EggMath  Bradlow, Sullivan, Levy, UIUC
A collection of modules (including many interactive applets) for K12 classrooms, based on the theme of eggs. Topics include: the shape of an egg (addressing symmetry and crosssection, surfaces of revolution, pin and string construction of ellipses, Cartesian
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 Egyptian Fractions  Jim Loy
"Egyptian fractions are interesting, but seem to be pretty much useless. Strangely, they were used well into the middle ages, in Europe. In this article, I will express them using our arabic numerals...."
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 Egyptian Mathematics  Mark Millmore
A clearlywritten description of the Egyptian numerical system, with some practice problems from John Heaton and Pam B. Newberry to test your understanding. Java calculator adds, subtracts, multiplies, and divides in Egyptian numerals.
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 Egyptian numerals  MacTutor Math History Archives
Linked essay on the Egyptians' base 10 system of hieroglyphs for numerals, with separate symbols for one unit, one ten, one hundred, one thousand, one ten thousand, one hundred thousand, and one million. With references and other related web sites.
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 EIA Kid's Page  U.S. Energy Information Administration
Sources and uses of energy. Graphs and tables show where our energy goes (transportation, heating homes, etc.) With Site Visits (class field trips), an Energy Quiz, Fun Facts, and links to online energy education resources.
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 Einstein Archives Online  The Hebrew University of Jerusalem
Freely view thousands of Einstein's writings, digitized from the manuscripts held by the Albert Einstein Archives at the Hebrew University of Jerusalem: scientific correspondence, travel diaries, family letters, and more. The site also enables access
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 Einstein's Big Idea  WGBH Boston
Resources to accompany the PBS broadcast "Einstein's Big Idea," the theory of special relativity: program transcript; teacher's guide; inquiry and articles; and "Interactives, Audio and More," which includes video of ten top physicists each describing
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 Ejercicios y Problemas de Matemática  Pablo Mateus
Ejercicios y problemas de números (natural, entero, racional, real), estadística, ecuaciones, funciones, análisis combinatorio, probabilidad, trigonometria, geometria, y más. También, um glosario y consejo sobre pruebas
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 Eleanor Roosevelt Fund Award  American Association of University Women (AAUW)
Established in 1989, the Eleanor Roosevelt Fund Award honors an individual, project, organization, or institution for outstanding contributions to equity and education for women and girls. The award is given for a broad range of activities including classroom
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 Electronic Bookshelf (Mathematics Across the Curriculum)  Dartmouth College
Materials produced by the MATC project are listed on the Electronic Bookshelf. Topics include: Algebra; Calculus and Differential Equations; Engineering; Physical Sciences; Art; Computer Science; History and Geography; PreAlgebra; Biology, Medicine,
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 Electronic Emissary  Judi Harris; Univ. of Texas at Austin
An Internetbased interpersonal resource online since February of 1993: a searchable database of experts and a way to request "matches" that helps teachers with access to the Internet locate other Internet accountholders who are experts in different
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 Electronic Games for Education in Math and Science (EGEMS)  British Columbia, Canada
Archives of a collaborative effort by scientists, educators, and professional video game and educational software developers to do research on and develop teaching materials that integrate video games and computerbased explorations with existing classroom
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 The Electronic Journal of Mathematics & Technology  WeiChi Yang, EditorinChief
The Electronic Journal of Mathematics & Technology (eJMT) publishes research addressing technologybased issues in all mathematical sciences. This international, refereed journal has four basic areas of interest: research in mathematics and its applications
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 The Electronic School  National Schools Boards Association (NSBA)
A supplement to The Executive Educator and The American School Board Journal magazines, published in cooperation with the Institute for the Transfer of Technology to Education (ITTE), a program of the NSBA. It seeks to be an editorially independent source
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 Elementary Math Games  Elementary Math Games
Free educational math games and printable math worksheets.
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 Elementary Problem of the Week  Department of Mathematics, Southwest Missouri State University (SMSU)
Word problems in number patterns, algebra, geometry, and other topics. Read the solution to the most recent problem, and archives of previous problems and their answers.
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 Elementary School Math Club  UTOPIA, University of Texas at Austin
Five plans for group activities that may be used by teachers or parents: Math Mobile; Number Paths; "Guess the Number" Magic Trick; The Human Counting Machine; and A Math Mural. This University of Texas at Austin site also offers Lesson Plans & Activities
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 Elementary Thoughts: A Collection of Gail's Responses  Gail Englert
A collection of Gail Englert's responses to questions from elementary and middle school teachers, parents, and students, in the Teacher2Teacher service. Covers a wide range of elementary mathematics topics, as well as teaching points.
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 Elevated Math  Elevated Lab Press
Instructional math videos, aligned to the Common Core State Standards (CCSS), enlivened with multiple voices as well as graphic and cartoon animation. This iPad app, which includes a whiteboard for working out math problems, comes with two lessons and
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 Eli's Math and Logic Puzzles and Other Interesting Things  Eli Karplus
A mixed bag of problems, some geared toward the 6th grade level, others to challenge college folk, with answers for a few. Three Men in a Hotel/The Missing Dollar; The Boatman Crossing the River with Fox, Chicken, and Cabbage; Benardete's Paradox; The
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 Ellipse and Parabola Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the area, eccentricity, perimeter of an ellipse; length of a parabolic segment.
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 Ellipsis Math  Dr. Valerie J. Henry
A curriculum for basic math facts that "incorporates research on best practices from countries around the world as well as cognitive research on memory and retrieval." Sample algebra word "wall cards"; browse and subscribe to the Math Motivator newsletter;
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 Ellipsoid, Torus, Spherical Polygon Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the surface area and/or volume of an ellipsoid, a prolate spheroid, an oblate spheroid, a circular or ring torus, and a spherical polygon.
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 El Niño Unveiled  Marcia Barton, Susan Freeman; Louisiana State University
What is El Niño? This threeday interdisciplinary Webquest for middle grades students combines natural history, math, and writing to introduce activities and research centered around El NiñoSouthern Oscillation (ENSO)  its history, cause,
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 The Elverson Puzzle Co., Inc.
The creators of Jacob's Revenge, the classic wine bottle puzzle. Elverson Puzzle also makes a Tangram Puzzle, the eleven tiles of which form a 6 inch diameter circle; Farkle, a game played with extra large wooden dice or online, with the dice roller that
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 EMail Math  Elizabeth Murphy
Using the Internet for a global exchange of studentwritten math story problems. Grade 4 students participated in an enrichment project entitled Cross Cultural Story Problems in Math from December '94 to May '95. Students received story problems from
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 eMathHelp
View worked solutions to problems, or submit your own to WyzAnt.com tutors. See also eMathHelp's notes on prealgebra, algebra, calculus, differential equations, and more.
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 Emaths
Free resources for maths teachers, organized into courses such as "Investigations / Rich Tasks / Puzzles," schemes of work, grade boundaries for key stages 2 and 3 of the SATs (UK National Curriculum Tests), jokes and funnies, and more. "Very old exam
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 Emaths.Info  Vinod Sebastian
Math tools, formulas, tutorials, videos, tables, and "curios," such as the unusual properties of 153, 1729, and 2519. See in particular Emaths' interactive games, which include the N queens problem, Towers of Hanoi, and partition magic, which finds a
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 Emilio Segrè Visual Archives  American Institute of Physics (AIP)
A collection of some 25,000 historical photographs, slides, lithographs, engravings, and other visual materials, focusing on American physicists and astronomers of the twentieth century, but including many scientists in Europe and elsewhere, in other
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 Employment and Careers (AMS)  American Mathematical Society
The AMS Employment Services section includes an overview, EIMS (Employment Information in the Mathematical Sciences) Employment Listings, a Mathematical Sciences Employment Center, Job Seeker's List, Graduate Student Services, AMS Standard Cover Sheet,
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 Empowering Teachers as Leaders [PDF file]  Paul M. Terry, University of Memphis
This article presents the need for what some view as a rather radical change in educational leadership. An argument for this change is proffered by reviewing the current leadership methodology and, for comparison, empowerment is explored as it relates
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 The EMPower Project  TERC
Extending Mathematical Power: A Math Curriculum for Adults, extends school mathematics reform to currently underserved populations so that they more effectively engage mathematical demands at work, at home as parents and caregivers, in the community,
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 EMTeachline
Commercial software and online demos with thousands of fully explained, stepbystep solutions of equations, inequalities, and more. With interactive teaching algorithms for training problemdrilling skills, testmaking software, and a guide to mathrelated
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 EnableMath  Art Bardige, Enablearning, Inc.
EnableMath helps students learn and understand arithmetic and algebra with Webbased adaptive/mastery practice and visualization of concepts. Free student trial, free for educators.
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 Encarta Online  Microsoft Corporation
Browse or search for math lessons and activities for K12 students and teachers, from problem solving to probability and more.
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 Encouraging Mathematical Thinking, Discourse around a Rich Problem  Math Forum: Bridging Research and Practice Group (BRAP)
This videopaper by the Math Forum's Bridging Research and Practice Group (BRAP) of teacher practitioners and Math Forum Staff opens a conversation around the use of discourse as a basis for encouraging students' mathematical thinking and supporting teachers'
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 Encyclopedia of Informal Education  Infed.org
Explores key ideas, practices and thinkers in informal education, lifelong learning and social action. Includes opinion pieces, event listings, support, and other resources. Infed.org is an independent and notforprofit site created by a small group
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 Engines for Education  Roger Schank, Institute for the Learning Sciences (ILS)
A "hyperbook" written by Roger Schank, Director of ILS, and Chip Cleary, a graduate student, about what's wrong with the education system, how to reform it, and the role of educational technology in that reform. CDROM version and hardcover and softcover
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 English Attack on the Longitude Problem  MacTutor Math History Archives
Linked essay covering the period from the mid17th through the mid18th century, with 9 references (books/articles).
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 The English Name of a Number  Landon Curt Noll
This program will help people obtain the names of very large numbers. You may enter a number or the power of ten you want. It will give you the name, or the digits, of your number in American or English style.
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 EnglishSpanish Numbers  EnchantedLearning.com
Read words and pronunciation guides for the numbers zero (cero) through twelve (doce). Link to a number matching quiz printout or a number writing printout.
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 Enigmalia. El país de los enigmas
In Spanish or Catalan: Web donde podrás resolver cada semana un nuevo problema matemático/lógico. Estos problemas versarán sobre los enigmalianos, habitantes de un país donde el motor que todo lo mueve es la curiosidad por los enigmas. La publicación
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 The Enigma Machine  Russell Schwager
This Java applet simulates the operation of an Enigma machine, based on the one used by the Germans in World War II to encrypt military messages. With information on the history and workings of the mechanical Enigma machine; a brief description of how
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